RIIE Random Shutdown

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Wasn't sure where to put this so GH seemed as good a place as any


Wondered if any of you may be able to help with a problem i have encountered tonight

Couple of hours back i was running the "scan for artifacts" test in ati tool when the PC suddenly shutdown - lights on the board are still illuminated but fans and everything else has shut off.

Pushed the power button on the mobo (i am running outside the case atm) at which point it starts up for a fraction of a second before shutting straight off again. First thing i thought was one of the GFX cards was borked because when i removed the lower card it booted through to windows - yay!

Opened up a browser, looked around for 10 mins when it shuts down again - WTF!!!

Tried turning it on a couple of times and got nothing but the same outcome, so i cleared the CMOS and it booted - yay! again. Got a message to hit F1 to set up the bios (time etc), in i goes and whilst setting time and date it shut down again - "NOOOOOOO"!!!!! "WTF NOW"!?!?

Tried both cards in the top PCI-E slot, one stick of RAM at a time in the two blue slots furthest from the CPU (didn't bother trying the closest slot as each stick or slot i tried the thing starts for a fraction of a second before shut down)

Tried a ATI X800 card, same outcome - on and straight off. Cleared CMOS booted as before in BIOS before shutting down again

Is my board dead?

So, seems to only boot when i have cleared the CMOS but then shuts down within a couple of minutes, otherwise i get the on and straight off shutdown

Does anyone have any idea? I haven't ruled out the PSU but it was running fine up until the first shutdown and as said it boots after a CMOS clear

Help, please
 
Hmmmm....only thing that comes to mind is overheating, the motherboard may be shutting down to prevent damage.
When you can turn your PC on is the cpu fan spinning ? Also if you can boot it up and go into bios leave it on the temp screen and keep monitoring this till it shutsdown and see if temps go up.
 
Yeah check something isnt shorting it if your running it outisde your case.

Also try another PSU if you can, could be that your PSU is on the way out. Pc turning itself off in my experience (now on 3rd PSU after 2 doing this, 1 of which blew up and sparked) results in PSU dying/ imminent death.

it might explain as well when you removed 1 gfx card you got further as theres less draw on the psu then it decided to give up even further.

Im edging 75% to psu
 
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i'm with hybrid on this one

i've managed to have a leak on my w/c setup, which went on my mobo, i now have this exact same issue (turn on for a split second then off) and am certain my psu is dead. i'm getting one off my mate tomorrow to test if it is that or the mobo, i'd highly recommend doing the same
 
I would go towards heat also, had a mate one time rang me up while I was in the pub saying his new build did the same thing, asked him to look in the bios at temps and he said it was on 89c at idle :O

After spitting out my lager managed to get him to stick some paste on it :/
 
Dutchman said:
Hmmmm....only thing that comes to mind is overheating, the motherboard may be shutting down to prevent damage.
When you can turn your PC on is the cpu fan spinning ? Also if you can boot it up and go into bios leave it on the temp screen and keep monitoring this till it shutsdown and see if temps go up.
Click to expand...

I am thinking i have narrowed it down to the mobo or the PSU. Got just the cpu, 24 pin and 8 pin connectors attached to the board. Switched it on and started - yay! At this point i was thinking GFX or RAM, so i switched it off and added an old ATI X1300 PRO GFX i have doing nothing and it booted again, then i started getting cocky and switched the X1300 for a 285 - came on for 30ish seconds and then shut off. Took the 285 out and tried it with just the psu and cpu, 30 seconds later it shut down again. "*******"!!! Tried it again and got the same on and straight off issue mentioned in the first post. This is now the only response i get from the board.

Managed to check CPU-Z after i had restarted just after the first CMOS clear. (last night) Temps were low. I have ruled that out unless i am overwhelmed by some evidence to suggest otherwise. When i switch on all attached fans spin up for a split second then shut off with the board (the board remains lit)

The only other board i had that was borked was a P5N-T Deluxe and that wouldn't accept power at all, no lights, nothing.

Couple of hours back i feared it might be the board but i now think it is the psu along with the two fellas above me. I have checked for shorts but not sure how it can be shorting sat on the mobo box.

The only other psu i have is some crappy old 500w POS that weighs less than my pouch of baccy and it only has a 4 pin connector. What i can do is pick up a 4 pin molex to 4 pin adapter tomorrow and see if the board will boot for more than 30 seconds. I don't think it is any where near 500w but it should have enough ummph for a stock cpu and a couple .53a fans *touches wood*.
 
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i'd completely star out that sweary mate :)

have you not got a mate you could pinch their psu off for a few hours? that 500w one sounds a bit of a no go, so i'd strongly advise getting a decent psu to test with.

good luck with it matey :)
 
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